The hospital has not revealed many details surrounding the birth, including when the baby boy was born. The patient and her family have also asked for privacy at this time, according to the hospital.

Giuliano Testa, the principal investigator of the uterine transplant clinical trial at the hospital called the birth a "milestone" and "a beautiful moment of love and hope for a mother who had been told she would never be able to carry her own child," in a statement.

The transplant was carried out as part of a clinical trial to study new infertility treatment options for women who don't have a functioning uterus. This could be because the women were born without the organ, lost the uterus or has one that no longer functions.

It's an irreversible condition, called uterine factor infertility, affecting as many as 5% of women worldwide.